ration, which is the number of inputs and outputs on the
board.
Note:
The J1 jumper is set correctly for each I/O board at
the factory.
The I/O boards also have adjustable input impedance and in-
put gain control. For more information on these topic, see
section 1.10, “Adjusting Gain Control,” 5.3.2, “Gain Control,”
and 5.3.1, “Impedance Jumpers.”
If adding a board that accommodates more than 12 inputs or
more than 8 outputs, a new control panel (if a Local X/Y Con-
trol Panel is used) is needed. Due to the size of these larger
boards one board takes up 2 board slots, reducing the number
of boards an enclosure can hold.
To remove an I/O board:
Warning: To avoid ESD (Electrostatic Discharge) damage to
sensitive components, make sure you are properly
grounded before handling any boards.
1.
Unplug the power cord from the rear of the enclosure.
2.
Remove the input and output signal wires from the I/O
board.
3.
Using a Phillips screwdriver, unscrew the holding screws
from the sides of the I/O board.
4.
Grasp the connectors on the I/O board and pull. The
board may be seated snugly; pull firmly but do not bend
the board.
To insert an I/O board:
Warning: To avoid ESD (Electrostatic Discharge) damage to
sensitive components, make sure you are properly
grounded before handling any boards.
1.
Line the board up with the I/O board guides on the inner
side walls of the enclosure. Carefully push the board all
the way in until it snaps into place. If the board resists
going in, the card edge connector is not lined up with the
receptor. Realign the connector and try again.
2.
Insert the holding screws on either side of the board and
secure the board to the enclosure.
3.
Attach all signal wires.
4.
Apply power to the enclosure.
1.10
Adjusting Gain Control
Gain control on audio and video output signals is standard.
AutoPatch also offers audio and video boards with input gain
control. At the factory, inputs and outputs are set to an over-
all gain of 1 (unity gain).
An extender board and gain control tool are included with the
1YDM. The extender board plugs into the rear of the I/O
board and allows it to be functional while the gain controls
1-10
Chapter 1
